| Title |
Electro-thermal Feedback Effects on the Signal in a Pulse Voltage Biased μ-bolometer Focal Plane Array |
| Authors |
박승만(Park, Seung-Man) ; 한승오(Han, Seungoh) |
| DOI |
https://doi.org/10.5370/KIEE.2012.61.12.1886 |
| Keywords |
μ-bolometer FPA ; Electrothermal feedback ; Effective thermal conductance ; Analytical models |
| Abstract |
In this paper, the analytical models for the electrothermal feedback of a μ-bolometer focal plane array(FPA) are proposed and applied to the conceptually designed FPA to investigate the electrothermal feedback effect on bolometer FPA signal. The temperature and resistance change of the μ-bolometer by the electrothermal feedback(ETF) model are increased upto 20 and 35.7 % of those of no feedback case, respectively, while those by the effective thermal conductance(ETC) model increased 8.5 and 15.1 %. The integration current and output voltage of a CTIA used as an column amplifier of FPA are also increased upto 41.6 and 32.4 % by the ETF model, while increased upto 17.2 and 13.5 % by the ETC model. The proposed models give more accurate temperature change, accordingly larger signal than no feedback considering case. Electrothermal feedback effect should be considered to design a high performance and high density μ-bolometer FPA. The proposed models are very useful to investigate the transient thermal analysis, also considered to be useful to predict the responsivity and dynamic range of μ-bolometer FPAs. |